TITLE:
Possible Geological Reason for the Missing of the Oligocene Section in Sector (5) and Its Vicinity, Deryanah-Al Abyar Area, Al Jabal Al Akhdar, NE Libya
AUTHORS:
Omar B. Elfigih, Hamza S. Melad
KEYWORDS:
Sector 5; Oligocene; Inversion; Uplift; Stratigraphic Correlation
JOURNAL NAME:
Open Journal of Geology,
Vol.3 No.4,
August
9,
2013
ABSTRACT:
The existing stratigraphic framework of the
Eocene-Miocene in the study area (sector 5) shows limited temporal stratigraphic
and structural resolution. Using this framework, it is difficult to unravel the
influence of possible local tectonic movements and eustatic sea level changes
on sedimentation. The precise influence of the onset of the possible Late Eocene-Early
Oligocene orogenic phase, which caused inversion and uplift in the study area
(sector 5), is also dubious as a result of the limited data. To improve the
correlations and recognition of the Eocene to Oligocene successions in the area
in question (from sector 1 to sector 8), a new stratigraphic interpretation,
based on correlated lithostratigraphic columns from different outcrops, is
presented. The changes in sedimentation and tectonic events in the study area
can be correlated to time-equivalent sea level changes and tectonic uplift in
Al Jabal Al Akhdar area, which suggests that the processes causing the sedimento/structural
activity are of regional importance.